Common name: Rudd
Scientific name: Scardinius erythrophthalmus (Linnaeus, 1758)
Family: Cyprinidae
Order: Cypriniformes
Class: Actinopterygii
Irish name: Ruán
Irish record angling fish: 2.041kg (1996, Coney Lake)
Native species: no historical documentary data5;
Hybrids: Rudd-Bream; Rudd-Roach

Identifying features

Cleft of mouth directed obliquely upwards; dorsal fin small, its origin well behind insertion of pelvic fins; anal fin short, with 10-13 branched rays. 39-44 scales along lateral line; young blue and silver; large fish green-backed, with a golden lustre, on the sides; dorsal reddish-brown, pelvic, anal and tail-fin red; commonly miscalled "roach" 4.

Environment and Habitat

Occur on the bottom or midwaters of a water body; migrate within freshwater only1; inhabits lowland lakes, backwaters and canals; size is dependant on food availability; can survive to 19 years old2; impacted by the spread of roach - populations of rudd do not thrive when roach enter system.

European distribution

Widespread across Europe; in Ireland it is plentiful in Co. Roscommon lakes and in Co. Clare; making a recovery in some sections of the Irish canals.

Economic value in Ireland

Solely an angling species.

Red list status

Least concern.

Irish legislation status

Protected by Coarse Fish bye-law No. 806, 2006: maximum 4 fish per angler per day; no killing of coarse fish > 25cm.

EU legislation status